With the rapid expansion of wireless consumer products, there has been a considerable increase in the need for radio-frequency (RF) planning, link planning, and propagation modeling.A network designer with no RF background may find himself/herself designing a wireless network. A wide array of RF planning software packages can provide some support, but there is no substitute for a fundamental understanding of the propagation process and the limitations of the models employed. Blind use of compute 文章来源:http://blog.csdn.net/metababy/archive/2006/01/12/577261.aspx